Category: <b>vendor-specific BIOS extensions</b>
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<pre><b>INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_LOCK" - RESERVE SUB-ADDRESSES</b>

	AX = 0400h
	BP = driver ID (see <a href=../../it/41/37.html>#03741</a>)
	DH,DL = major,minor address (optional)
Return: AH = status (see <a href=../../it/44/37.html>#03744</a>)
	BP,DS destroyed
Desc:	reserve specified sub-addresses on an already-allocated driver for
	  exclusive access
Note:	this function is documented as present but unsupported in the drivers
	  V_LTABLET, V_LPOINTER, and V_LTOUCH
SeeAlso: AX=0200h"HP Vectra",AX=0402h"SF_UNLOCK"
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